brand new dc-dc...big spark

hey, well i just got my dc-dc, and rigged it up to the car. Sadly, im a stupid idiot and i put the neg. in the pos. and the pos. in the neg. and SPARK! car fuse blown. After replacing the fuse in the car, now the DC-DC dosent work . have i killed it?

unfortunally, reversing polarity is still number one cause of killing electronics.
thank god that manufacturers know this and in most cases it wont kill your things totally.
you most lightly killed somekind of protection in the circuit somewhere

ok...i found the neg. the psu still doesnt work. I also found the fuse on the psu, its fine. The dc-dc is from ICP Electronics, model ACE-865V Dc input: 8v-16v===15a
dc output: +5v==6a
-12v==0.5a
+12v==2a
-5v==0.3a

thanks you guys, you have been a great help, any suggestions, or anything else that could be the cause of it....anyone want to buy a DC-DC psu...lol